endorphin-es-golden-master

Endorphin.es Golden Master

Three-band mastering punch for modular signals

6 HP Eurorack module

Golden Master is a 6HP stereo multiband mastering processor inspired by 1990s studio and radio loudness units, offering simultaneous EQ, compression, and mid/side processing across three frequency bands. It features a brickwall limiter, digital input saturation, and pseudo-balanced outputs, making it the ideal end-of-chain module for adding punch, dynamics, and cohesion to modular mixes.

Features

  • Three frequency bands: Low (20Hz-300Hz), Mid (300Hz-3kHz), High (3kHz-20kHz)
  • Per-band EQ with +8dB boost and -20dB cut
  • Per-band stereo compressor with automatic makeup gain and 1.5ms look-ahead
  • Per-band mid/side stereo processing for widening or narrowing
  • Brickwall limiter with 1.5ms look-ahead at end of chain
  • Digital input gain saturator up to +10dB
  • 16-bit 96kHz audio I/O with 32-bit internal processing
  • Per-band mute buttons with live performance use
  • VCA CV input (0-5V) for voltage-controlled output level
  • Pseudo-balanced outputs compatible with TRS cables for noise cancellation
  • IN L normalled to IN R for mono-to-stereo operation
  • Stereo VU meter with clipping indicators (4 LEDs total)

Controls & Jacks (28)

  • Mode— Short press to select editing mode (Blue: EQ, Red: Compressor, Fuchsia: Mid/Side). Long press resets controls to default.
  • Low Band EQ/Compressor/Mid-Side— Adjusts low band (approx 20Hz-300Hz) level in EQ mode (-20dB to +8dB), compressor preset in compressor mode, or stereo width in mid/side mod
  • Low Band Mute/Compressor Enable— Adjusts mid band (300Hz-3kHz) level in EQ mode (-20dB to +8dB), compressor preset in compressor mode, or stereo width in mid/side mode.
  • Low Band Mute/Compressor Enable— Adjusts mid band (300Hz-3kHz) level in EQ mode (-20dB to +8dB), compressor preset in compressor mode, or stereo width in mid/side mode.
  • Mid Band Mute/Compressor Enable— Short press to mute the mid band. Long press (>1.5s) to enable compressor for the mid band. LED semi-dimmed when muted, fully lit when compr
  • Mid Band EQ/Compressor/Mid-Side— Adjusts high band (approx 3kHz-20kHz) level in EQ mode (-20dB to +8dB), compressor preset in compressor mode, or stereo width in mid/side mo
  • VCA CV— Post-VCA, pre-Volume knob CV input. CV range 0V to +5V. 0V = silence, 5V = full volume.
  • Out Left— Final left stereo audio output. Can be used as pseudo-balanced output with TRS cable for DI-box functionality.
  • In Left— Left stereo audio input. Normalled to In Right when no cable is plugged in. Accepts line or modular level signals up to ±6.5V.
  • High Band Mute/Compressor Enable— Short press to mute the high band. Long press (>1.5s) to enable compressor for the high band. LED semi-dimmed when muted, fully lit when com
  • VU Meter LEDs— 4 LEDs act as volume unit meters (2 per stereo channel). Inner pair lights according to signal level, outer pair lights when clipping occurs
  • Volume— Final audio volume level. Maximum at full CW, silent at full CCW.
  • In Right— Right stereo audio input. Accepts line or modular level signals up to ±6.5V.
  • Out Right— Final right stereo audio output. Can be used as pseudo-balanced output with TRS cable for DI-box functionality.
  • clip
  • Mode— Short press to select editing mode (Blue: EQ, Red: Compressor, Fuchsia: Mid/Side). Long press resets controls to default.
  • Input Gain— Digital input gain saturator up to +10dB. Boosts signal level to hit the compressor harder.
  • in gain
  • LOW BAND— Adjusts low band (approx 20Hz-300Hz) level in EQ mode (-20dB to +8dB), compressor preset in compressor mode, or stereo width in mid/side mod
  • MID BAND— Adjusts mid band (300Hz-3kHz) level in EQ mode (-20dB to +8dB), compressor preset in compressor mode, or stereo width in mid/side mode.
  • HIGH BAND— Adjusts high band (approx 3kHz-20kHz) level in EQ mode (-20dB to +8dB), compressor preset in compressor mode, or stereo width in mid/side mo
  • LOW BAND MUTE— Short press to mute the low band. Long press (>1.5s) to enable compressor for the low band. LED semi-dimmed when muted, fully lit when compr
  • MID BAND MUTE— Short press to mute the mid band. Long press (>1.5s) to enable compressor for the mid band. LED semi-dimmed when muted, fully lit when compr
  • HIGH BAND MUTE— Short press to mute the high band. Long press (>1.5s) to enable compressor for the high band. LED semi-dimmed when muted, fully lit when com
  • IN 1— Left stereo audio input. Normalled to In Right when no cable is plugged in. Accepts line or modular level signals up to ±6.5V.
  • IN 2— Right stereo audio input. Accepts line or modular level signals up to ±6.5V.
  • OUT 1— Final left stereo audio output. Can be used as pseudo-balanced output with TRS cable for DI-box functionality.
  • OUT 2— Final right stereo audio output. Can be used as pseudo-balanced output with TRS cable for DI-box functionality.

How-To Guides

  • Reset Module to Default State
  • Perform Firmware Update
  • Full Mix Glue and Limiting
  • Bass Tightening and Mono Low End
  • Feedback Patch Safety Net
  • Multiband Stereo Widening
  • CV-Controlled Mix Automation
  • Heavy Drum Bus Compression
  • Mono Source Enhancement
  • Live Band Drop Performance

Explore the interactive Golden Master panel on BleepDex — tap any control to learn what it does.

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